FULL tutorial on integrating a gamecenter leaderboard into your iOS games using Swift.
If you enjoyed, please check out Campus Files, my social media development project:
http://www.twitter.com/campus_files
http://campusfiles.launchrock.com
Cheat sheet (all the code you will need): https://drive.google.com/file/d/0B763wDJVXUR_bW1yWTA4N252T2M/view?usp=sharing
